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随着岩性油气藏勘探的不断深入,对岩性圈闭识别精度的要求也越来越高,需要对目前的储层预测技术进行改进和提高。相控模式下的储层预测方法是通过对沉积相的精细分析,确定有利储层发育的相带范围,在有利相带内开展属性分析、分频反演等储层预测工作,从定性到定量地研究砂岩的分布,结合三维可视化解释精细雕刻岩性圈闭的形态,最终通过综合评价落实有利勘探目标。通过有侧重的应用技术,有效地减少了储层预测结果的不确定性,提高了识别岩性圈闭的能力和精度。位于松辽盆地西部斜坡的海坨北地区纵横向沉积相变化快,在青山口组划分了河口坝、分支河道、席状砂、分支河道间和滨浅湖泥等沉积微相,通过在其分支河道和河口坝微相区域进行反演和属性分析,精细落实砂岩圈闭范围,预测岩性圈闭109个,面积达1386.13km2,提供钻探目标25个。
With the deepening exploration of lithologic reservoirs, the requirements for lithologic trapping recognition accuracy are also getting higher and higher, and the current reservoir prediction techniques need to be improved and improved. The reservoir prediction method in phased control mode is through the careful analysis of sedimentary facies, determining the facies belt range for favorable reservoir development, carrying out property analysis, frequency inversion and other reservoir prediction in favorable facies belt, from qualitative to Quantitatively study the distribution of sandstone, combined with three-dimensional visualization of fine carved lithologic traps morphology, and ultimately through the comprehensive evaluation of the implementation of favorable exploration targets. Through focused application techniques, the uncertainty of reservoir prediction results is effectively reduced, and the ability and accuracy of identifying lithologic traps are enhanced. The vertical and horizontal sedimentary facies of the sea turtles in the western slope of the Songliao Basin changed rapidly, and the sedimentary microfacies of estuary dam, branch channel, sand sheet, branch channel and shore shallow lake mud were divided in Qingshankou Formation. The inversion and attribute analysis of the branch channel and the estuary dam microfacies region are carried out. The sandstone trap area is finely implemented, and 109 lithologic traps are predicted with an area of 1386.13km2 and 25 drilling targets.